- Amenorrheic for at least 12 consecutive months; menopausal status in amenorrheic females will be confirmed by demonstrating levels of follicle stimulating hormone (FSH) >40-138 mIU/mL and estradiol < 30 pg/mL at entry. In the event a subject's menopause status has been clearly established (for example, the subject indicates she has been amenorrheic for 10 years), but FSH and/or estradiol levels are not consistent with a post-menopausal condition, determination of subject eligibility will be at the discretion of the principal investigator with agreement of the independent medical monitor